code.delx.au - refind/blob - refind/menu.c

   1 /*
   2  * refit/menu.c
   3  * Menu functions
   4  *
   5  * Copyright (c) 2006 Christoph Pfisterer
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  *  * Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  *  * Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  *  * Neither the name of Christoph Pfisterer nor the names of the
  21  *    contributors may be used to endorse or promote products derived
  22  *    from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36 /*
  37  * Modifications copyright (c) 2012 Roderick W. Smith
  38  *
  39  * Modifications distributed under the terms of the GNU General Public
  40  * License (GPL) version 3 (GPLv3), a copy of which must be distributed
  41  * with this source code or binaries made from it.
  42  *
  43  */
  44
  45 #include "global.h"
  46 #include "screen.h"
  47 #include "lib.h"
  48 #include "menu.h"
  49 #include "config.h"
  50 #include "libeg.h"
  51 #include "../include/refit_call_wrapper.h"
  52
  53 #include "../include/egemb_back_selected_small.h"
  54 #include "../include/egemb_arrow_left.h"
  55 #include "../include/egemb_arrow_right.h"
  56
  57 // other menu definitions
  58
  59 #define MENU_FUNCTION_INIT            (0)
  60 #define MENU_FUNCTION_CLEANUP         (1)
  61 #define MENU_FUNCTION_PAINT_ALL       (2)
  62 #define MENU_FUNCTION_PAINT_SELECTION (3)
  63 #define MENU_FUNCTION_PAINT_TIMEOUT   (4)
  64
  65 typedef VOID (*MENU_STYLE_FUNC)(IN REFIT_MENU_SCREEN *Screen, IN SCROLL_STATE *State, IN UINTN Function, IN CHAR16 *ParamText);
  66
  67 static CHAR16 ArrowUp[2] = { ARROW_UP, 0 };
  68 static CHAR16 ArrowDown[2] = { ARROW_DOWN, 0 };
  69
  70 #define TEXT_YMARGIN (2)
  71 #define TEXT_XMARGIN (8)
  72 #define TEXT_LINE_HEIGHT (FONT_CELL_HEIGHT + TEXT_YMARGIN * 2)
  73 #define TITLEICON_SPACING (16)
  74
  75 #define ROW0_TILESIZE (144)
  76 #define ROW1_TILESIZE (64)
  77 #define TILE_XSPACING (8)
  78 #define TILE_YSPACING (16)
  79
  80 // Alignment values for PaintIcon()
  81 #define ALIGN_RIGHT 1
  82 #define ALIGN_LEFT 0
  83
  84 static EG_IMAGE *SelectionImages[4] = { NULL, NULL, NULL, NULL };
  85 static EG_PIXEL SelectionBackgroundPixel = { 0xff, 0xff, 0xff, 0 };
  86 static EG_IMAGE *TextBuffer = NULL;
  87
  88 //
  89 // Graphics helper functions
  90 //
  91
  92 static VOID InitSelection(VOID)
  93 {
  94     UINTN       x, y, src_x, src_y;
  95     EG_PIXEL    *DestPtr, *SrcPtr;
  96
  97     if (!AllowGraphicsMode)
  98         return;
  99     if (SelectionImages[0] != NULL)
 100         return;
 101
 102     // load small selection image
 103     if (GlobalConfig.SelectionSmallFileName != NULL) {
 104         SelectionImages[2] = egLoadImage(SelfDir, GlobalConfig.SelectionSmallFileName, FALSE);
 105     }
 106     if (SelectionImages[2] == NULL)
 107         SelectionImages[2] = egPrepareEmbeddedImage(&egemb_back_selected_small, FALSE);
 108     SelectionImages[2] = egEnsureImageSize(SelectionImages[2],
 109                                            ROW1_TILESIZE, ROW1_TILESIZE, &MenuBackgroundPixel);
 110     if (SelectionImages[2] == NULL)
 111         return;
 112
 113     // load big selection image
 114     if (GlobalConfig.SelectionBigFileName != NULL) {
 115         SelectionImages[0] = egLoadImage(SelfDir, GlobalConfig.SelectionBigFileName, FALSE);
 116         SelectionImages[0] = egEnsureImageSize(SelectionImages[0],
 117                                                ROW0_TILESIZE, ROW0_TILESIZE, &MenuBackgroundPixel);
 118     }
 119     if (SelectionImages[0] == NULL) {
 120         // calculate big selection image from small one
 121
 122         SelectionImages[0] = egCreateImage(ROW0_TILESIZE, ROW0_TILESIZE, FALSE);
 123         if (SelectionImages[0] == NULL) {
 124             egFreeImage(SelectionImages[2]);
 125             SelectionImages[2] = NULL;
 126             return;
 127         }
 128
 129         DestPtr = SelectionImages[0]->PixelData;
 130         SrcPtr  = SelectionImages[2]->PixelData;
 131         for (y = 0; y < ROW0_TILESIZE; y++) {
 132             if (y < (ROW1_TILESIZE >> 1))
 133                 src_y = y;
 134             else if (y < (ROW0_TILESIZE - (ROW1_TILESIZE >> 1)))
 135                 src_y = (ROW1_TILESIZE >> 1);
 136             else
 137                 src_y = y - (ROW0_TILESIZE - ROW1_TILESIZE);
 138
 139             for (x = 0; x < ROW0_TILESIZE; x++) {
 140                 if (x < (ROW1_TILESIZE >> 1))
 141                     src_x = x;
 142                 else if (x < (ROW0_TILESIZE - (ROW1_TILESIZE >> 1)))
 143                     src_x = (ROW1_TILESIZE >> 1);
 144                 else
 145                     src_x = x - (ROW0_TILESIZE - ROW1_TILESIZE);
 146
 147                 *DestPtr++ = SrcPtr[src_y * ROW1_TILESIZE + src_x];
 148             }
 149         }
 150     }
 151
 152     // non-selected background images
 153     SelectionImages[1] = egCreateFilledImage(ROW0_TILESIZE, ROW0_TILESIZE, FALSE, &MenuBackgroundPixel);
 154     SelectionImages[3] = egCreateFilledImage(ROW1_TILESIZE, ROW1_TILESIZE, FALSE, &MenuBackgroundPixel);
 155 }
 156
 157 //
 158 // Scrolling functions
 159 //
 160
 161 static VOID InitScroll(OUT SCROLL_STATE *State, IN UINTN ItemCount, IN UINTN VisibleSpace)
 162 {
 163     State->PreviousSelection = State->CurrentSelection = 0;
 164     State->MaxIndex = (INTN)ItemCount - 1;
 165     State->FirstVisible = 0;
 166     if (AllowGraphicsMode) {
 167        State->MaxVisible = UGAWidth / (ROW0_TILESIZE + TILE_XSPACING) - 1;
 168     } else
 169        State->MaxVisible = ConHeight - 4;
 170     if ((VisibleSpace > 0) && (VisibleSpace < State->MaxVisible))
 171         State->MaxVisible = (INTN)VisibleSpace;
 172     State->PaintAll = TRUE;
 173     State->PaintSelection = FALSE;
 174
 175     State->LastVisible = State->FirstVisible + State->MaxVisible - 1;
 176 }
 177
 178 // Adjust variables relating to the scrolling of tags, for when a selected icon isn't
 179 // visible given the current scrolling condition....
 180 static VOID AdjustScrollState(IN SCROLL_STATE *State) {
 181    if (State->CurrentSelection > State->LastVisible) {
 182       State->LastVisible = State->CurrentSelection;
 183       State->FirstVisible = 1 + State->CurrentSelection - State->MaxVisible;
 184       if (State->FirstVisible < 0) // shouldn't happen, but just in case....
 185          State->FirstVisible = 0;
 186       State->PaintAll = TRUE;
 187    } // Scroll forward
 188    if (State->CurrentSelection < State->FirstVisible) {
 189       State->FirstVisible = State->CurrentSelection;
 190       State->LastVisible = State->CurrentSelection + State->MaxVisible - 1;
 191       State->PaintAll = TRUE;
 192    } // Scroll backward
 193 } // static VOID AdjustScrollState
 194
 195 static VOID UpdateScroll(IN OUT SCROLL_STATE *State, IN UINTN Movement)
 196 {
 197     State->PreviousSelection = State->CurrentSelection;
 198
 199     switch (Movement) {
 200         case SCROLL_LINE_LEFT:
 201             if (State->CurrentSelection > 0) {
 202                 State->CurrentSelection --;
 203             }
 204             break;
 205
 206         case SCROLL_LINE_RIGHT:
 207             if (State->CurrentSelection < State->MaxIndex) {
 208                 State->CurrentSelection ++;
 209             }
 210             break;
 211
 212         case SCROLL_LINE_UP:
 213             if (State->ScrollMode == SCROLL_MODE_ICONS) {
 214                if (State->CurrentSelection >= State->InitialRow1) {
 215                   if (State->MaxIndex > State->InitialRow1) { // avoid division by 0!
 216                      State->CurrentSelection = State->FirstVisible + (State->LastVisible - State->FirstVisible) *
 217                                                (State->CurrentSelection - State->InitialRow1) /
 218                                                (State->MaxIndex - State->InitialRow1);
 219                   } else {
 220                      State->CurrentSelection = State->FirstVisible;
 221                   } // if/else
 222                } // if in second row
 223             } else {
 224                if (State->CurrentSelection > 0)
 225                   State->CurrentSelection--;
 226             } // if/else
 227             break;
 228
 229         case SCROLL_LINE_DOWN:
 230            if (State->ScrollMode == SCROLL_MODE_ICONS) {
 231                if (State->CurrentSelection <= State->FinalRow0) {
 232                   if (State->LastVisible > State->FirstVisible) { // avoid division by 0!
 233                      State->CurrentSelection = State->InitialRow1 + (State->MaxIndex - State->InitialRow1) *
 234                                                (State->CurrentSelection - State->FirstVisible) /
 235                                                (State->LastVisible - State->FirstVisible);
 236                   } else {
 237                      State->CurrentSelection = State->InitialRow1;
 238                   } // if/else
 239                } // if in first row
 240             } else {
 241                if (State->CurrentSelection < State->MaxIndex)
 242                   State->CurrentSelection++;
 243             } // if/else
 244             break;
 245
 246         case SCROLL_PAGE_UP:
 247            if (State->CurrentSelection <= State->FinalRow0)
 248               State->CurrentSelection -= State->MaxVisible;
 249            else if (State->CurrentSelection == State->InitialRow1)
 250               State->CurrentSelection = State->FinalRow0;
 251            else
 252               State->CurrentSelection = State->InitialRow1;
 253            if (State->CurrentSelection < 0)
 254               State->CurrentSelection = 0;
 255            break;
 256
 257         case SCROLL_FIRST:
 258            if (State->CurrentSelection > 0) {
 259               State->PaintAll = TRUE;
 260               State->CurrentSelection = 0;
 261            }
 262            break;
 263
 264         case SCROLL_PAGE_DOWN:
 265            if (State->CurrentSelection < State->FinalRow0) {
 266               State->CurrentSelection += State->MaxVisible;
 267               if (State->CurrentSelection > State->FinalRow0)
 268                  State->CurrentSelection = State->FinalRow0;
 269            } else if (State->CurrentSelection == State->FinalRow0) {
 270               State->CurrentSelection++;
 271            } else {
 272               State->CurrentSelection = State->MaxIndex;
 273            }
 274            if (State->CurrentSelection > State->MaxIndex)
 275               State->CurrentSelection = State->MaxIndex;
 276            break;
 277
 278         case SCROLL_LAST:
 279            if (State->CurrentSelection < State->MaxIndex) {
 280               State->PaintAll = TRUE;
 281               State->CurrentSelection = State->MaxIndex;
 282            }
 283            break;
 284
 285         case SCROLL_NONE:
 286             break;
 287
 288     }
 289     if (State->ScrollMode == SCROLL_MODE_TEXT)
 290        AdjustScrollState(State);
 291
 292     if (!State->PaintAll && State->CurrentSelection != State->PreviousSelection)
 293         State->PaintSelection = TRUE;
 294     State->LastVisible = State->FirstVisible + State->MaxVisible - 1;
 295 } // static VOID UpdateScroll()
 296
 297 //
 298 // menu helper functions
 299 //
 300
 301 VOID AddMenuInfoLine(IN REFIT_MENU_SCREEN *Screen, IN CHAR16 *InfoLine)
 302 {
 303     AddListElement((VOID ***) &(Screen->InfoLines), &(Screen->InfoLineCount), InfoLine);
 304 }
 305
 306 VOID AddMenuEntry(IN REFIT_MENU_SCREEN *Screen, IN REFIT_MENU_ENTRY *Entry)
 307 {
 308     AddListElement((VOID ***) &(Screen->Entries), &(Screen->EntryCount), Entry);
 309 }
 310
 311 VOID FreeMenu(IN REFIT_MENU_SCREEN *Screen)
 312 {
 313     if (Screen->Entries)
 314         FreePool(Screen->Entries);
 315 }
 316
 317 static INTN FindMenuShortcutEntry(IN REFIT_MENU_SCREEN *Screen, IN CHAR16 *Shortcut)
 318 {
 319     UINTN i;
 320
 321     if (Shortcut == NULL)
 322        return (-1);
 323
 324     if (StrLen(Shortcut) == 1) {
 325       if (Shortcut[0] >= 'a' && Shortcut[0] <= 'z')
 326          Shortcut[0] -= ('a' - 'A');
 327       if (Shortcut[0]) {
 328          for (i = 0; i < Screen->EntryCount; i++) {
 329                if (Screen->Entries[i]->ShortcutDigit == Shortcut[0] || Screen->Entries[i]->ShortcutLetter == Shortcut[0]) {
 330                   return i;
 331                } // if
 332          } // for
 333       } // if
 334     } else if (StrLen(Shortcut) > 1) {
 335        for (i = 0; i < Screen->EntryCount; i++) {
 336           if (StriSubCmp(Shortcut, Screen->Entries[i]->Title))
 337              return i;
 338        } // for
 339     }
 340     return -1;
 341 }
 342
 343 // Identify the end of row 0 and the beginning of row 1; store the results in the
 344 // appropriate fields in State. Also reduce MaxVisible if that value is greater
 345 // than the total number of row-0 tags and if we're in an icon-based screen
 346 static VOID IdentifyRows(IN SCROLL_STATE *State, IN REFIT_MENU_SCREEN *Screen) {
 347    UINTN i;
 348
 349    State->FinalRow0 = 0;
 350    State->InitialRow1 = State->MaxIndex;
 351    for (i = 0; i < State->MaxIndex; i++) {
 352       if (Screen->Entries[i]->Row == 0) {
 353          State->FinalRow0 = i;
 354       } else if ((Screen->Entries[i]->Row == 1) && (State->InitialRow1 > i)) {
 355          State->InitialRow1 = i;
 356       } // if/else
 357    } // for
 358    if ((State->ScrollMode == SCROLL_MODE_ICONS) && (State->MaxVisible > (State->FinalRow0 + 1)))
 359       State->MaxVisible = State->FinalRow0 + 1;
 360 } // static VOID IdentifyRows()
 361
 362 //
 363 // generic menu function
 364 //
 365 static UINTN RunGenericMenu(IN REFIT_MENU_SCREEN *Screen, IN MENU_STYLE_FUNC StyleFunc, IN INTN DefaultEntryIndex, OUT REFIT_MENU_ENTRY **ChosenEntry)
 366 {
 367     SCROLL_STATE State;
 368     EFI_STATUS Status;
 369     EFI_INPUT_KEY key;
 370     UINTN index;
 371     INTN ShortcutEntry;
 372     BOOLEAN HaveTimeout = FALSE;
 373     UINTN TimeoutCountdown = 0;
 374     CHAR16 TimeoutMessage[256];
 375     CHAR16 KeyAsString[2];
 376     UINTN MenuExit;
 377
 378     if (Screen->TimeoutSeconds > 0) {
 379         HaveTimeout = TRUE;
 380         TimeoutCountdown = Screen->TimeoutSeconds * 10;
 381     }
 382     MenuExit = 0;
 383
 384     StyleFunc(Screen, &State, MENU_FUNCTION_INIT, NULL);
 385     IdentifyRows(&State, Screen);
 386     // override the starting selection with the default index, if any
 387     if (DefaultEntryIndex >= 0 && DefaultEntryIndex <= State.MaxIndex) {
 388         State.CurrentSelection = DefaultEntryIndex;
 389         UpdateScroll(&State, SCROLL_NONE);
 390     }
 391
 392     while (!MenuExit) {
 393         // update the screen
 394         if (State.PaintAll) {
 395             StyleFunc(Screen, &State, MENU_FUNCTION_PAINT_ALL, NULL);
 396             State.PaintAll = FALSE;
 397         } else if (State.PaintSelection) {
 398             StyleFunc(Screen, &State, MENU_FUNCTION_PAINT_SELECTION, NULL);
 399             State.PaintSelection = FALSE;
 400         }
 401
 402         if (HaveTimeout) {
 403             SPrint(TimeoutMessage, 255, L"%s in %d seconds", Screen->TimeoutText, (TimeoutCountdown + 5) / 10);
 404             StyleFunc(Screen, &State, MENU_FUNCTION_PAINT_TIMEOUT, TimeoutMessage);
 405         }
 406
 407         // read key press (and wait for it if applicable)
 408         Status = refit_call2_wrapper(ST->ConIn->ReadKeyStroke, ST->ConIn, &key);
 409         if (Status == EFI_NOT_READY) {
 410             if (HaveTimeout && TimeoutCountdown == 0) {
 411                 // timeout expired
 412                 MenuExit = MENU_EXIT_TIMEOUT;
 413                 break;
 414             } else if (HaveTimeout) {
 415                 refit_call1_wrapper(BS->Stall, 100000);
 416                 TimeoutCountdown--;
 417             } else
 418                 refit_call3_wrapper(BS->WaitForEvent, 1, &ST->ConIn->WaitForKey, &index);
 419             continue;
 420         }
 421         if (HaveTimeout) {
 422             // the user pressed a key, cancel the timeout
 423             StyleFunc(Screen, &State, MENU_FUNCTION_PAINT_TIMEOUT, L"");
 424             HaveTimeout = FALSE;
 425         }
 426
 427         // react to key press
 428         switch (key.ScanCode) {
 429             case SCAN_UP:
 430                 UpdateScroll(&State, SCROLL_LINE_UP);
 431                 break;
 432             case SCAN_LEFT:
 433                 UpdateScroll(&State, SCROLL_LINE_LEFT);
 434                 break;
 435             case SCAN_DOWN:
 436                 UpdateScroll(&State, SCROLL_LINE_DOWN);
 437                 break;
 438             case SCAN_RIGHT:
 439                 UpdateScroll(&State, SCROLL_LINE_RIGHT);
 440                 break;
 441             case SCAN_HOME:
 442                 UpdateScroll(&State, SCROLL_FIRST);
 443                 break;
 444             case SCAN_END:
 445                 UpdateScroll(&State, SCROLL_LAST);
 446                 break;
 447             case SCAN_PAGE_UP:
 448                 UpdateScroll(&State, SCROLL_PAGE_UP);
 449                 break;
 450             case SCAN_PAGE_DOWN:
 451                 UpdateScroll(&State, SCROLL_PAGE_DOWN);
 452                 break;
 453             case SCAN_ESC:
 454                 MenuExit = MENU_EXIT_ESCAPE;
 455                 break;
 456             case SCAN_INSERT:
 457             case SCAN_F2:
 458                 MenuExit = MENU_EXIT_DETAILS;
 459                 break;
 460             case SCAN_F10:
 461                 egScreenShot();
 462                 break;
 463             case 0x0016: // F12
 464                if (EjectMedia())
 465                   MenuExit = MENU_EXIT_ESCAPE;
 466                break;
 467         }
 468         switch (key.UnicodeChar) {
 469             case CHAR_LINEFEED:
 470             case CHAR_CARRIAGE_RETURN:
 471             case ' ':
 472                 MenuExit = MENU_EXIT_ENTER;
 473                 break;
 474             case '+':
 475                 MenuExit = MENU_EXIT_DETAILS;
 476                 break;
 477             default:
 478                 KeyAsString[0] = key.UnicodeChar;
 479                 KeyAsString[1] = 0;
 480                 ShortcutEntry = FindMenuShortcutEntry(Screen, KeyAsString);
 481                 if (ShortcutEntry >= 0) {
 482                     State.CurrentSelection = ShortcutEntry;
 483                     MenuExit = MENU_EXIT_ENTER;
 484                 }
 485                 break;
 486         }
 487     }
 488
 489     StyleFunc(Screen, &State, MENU_FUNCTION_CLEANUP, NULL);
 490
 491     if (ChosenEntry)
 492         *ChosenEntry = Screen->Entries[State.CurrentSelection];
 493     return MenuExit;
 494 } /* static UINTN RunGenericMenu( */
 495
 496 //
 497 // text-mode generic style
 498 //
 499
 500 static VOID TextMenuStyle(IN REFIT_MENU_SCREEN *Screen, IN SCROLL_STATE *State, IN UINTN Function, IN CHAR16 *ParamText)
 501 {
 502     INTN i;
 503     UINTN MenuWidth, ItemWidth, MenuHeight;
 504     static UINTN MenuPosY;
 505     static CHAR16 **DisplayStrings;
 506     CHAR16 TimeoutMessage[256];
 507
 508     State->ScrollMode = SCROLL_MODE_TEXT;
 509     switch (Function) {
 510
 511         case MENU_FUNCTION_INIT:
 512             // vertical layout
 513             MenuPosY = 4;
 514             if (Screen->InfoLineCount > 0)
 515                 MenuPosY += Screen->InfoLineCount + 1;
 516             MenuHeight = ConHeight - MenuPosY;
 517             if (Screen->TimeoutSeconds > 0)
 518                 MenuHeight -= 2;
 519             InitScroll(State, Screen->EntryCount, MenuHeight);
 520
 521             // determine width of the menu
 522             MenuWidth = 20;  // minimum
 523             for (i = 0; i <= State->MaxIndex; i++) {
 524                 ItemWidth = StrLen(Screen->Entries[i]->Title);
 525                 if (MenuWidth < ItemWidth)
 526                     MenuWidth = ItemWidth;
 527             }
 528             if (MenuWidth > ConWidth - 6)
 529                 MenuWidth = ConWidth - 6;
 530
 531             // prepare strings for display
 532             DisplayStrings = AllocatePool(sizeof(CHAR16 *) * Screen->EntryCount);
 533             for (i = 0; i <= State->MaxIndex; i++)
 534                 SPrint(DisplayStrings[i], Screen->EntryCount, L" %-.*s ", MenuWidth, Screen->Entries[i]->Title);
 535 //                DisplayStrings[i] = PoolPrint(L" %-.*s ", MenuWidth, Screen->Entries[i]->Title);
 536             // TODO: use more elaborate techniques for shortening too long strings (ellipses in the middle)
 537             // TODO: account for double-width characters
 538
 539             // initial painting
 540             BeginTextScreen(Screen->Title);
 541             if (Screen->InfoLineCount > 0) {
 542                 refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_BASIC);
 543                 for (i = 0; i < (INTN)Screen->InfoLineCount; i++) {
 544                     refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 3, 4 + i);
 545                     refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, Screen->InfoLines[i]);
 546                 }
 547             }
 548
 549             break;
 550
 551         case MENU_FUNCTION_CLEANUP:
 552             // release temporary memory
 553             for (i = 0; i <= State->MaxIndex; i++)
 554                 FreePool(DisplayStrings[i]);
 555             FreePool(DisplayStrings);
 556             break;
 557
 558         case MENU_FUNCTION_PAINT_ALL:
 559             // paint the whole screen (initially and after scrolling)
 560             for (i = 0; i <= State->MaxIndex; i++) {
 561                 if (i >= State->FirstVisible && i <= State->LastVisible) {
 562                     refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 2, MenuPosY + (i - State->FirstVisible));
 563                     if (i == State->CurrentSelection)
 564                        refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_CHOICE_CURRENT);
 565                     else
 566                        refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_CHOICE_BASIC);
 567                     refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, DisplayStrings[i]);
 568                 }
 569             }
 570             // scrolling indicators
 571             refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_SCROLLARROW);
 572             refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 0, MenuPosY);
 573             if (State->FirstVisible > 0)
 574                 refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, ArrowUp);
 575             else
 576                refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, L" ");
 577             refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 0, MenuPosY + State->MaxVisible);
 578             if (State->LastVisible < State->MaxIndex)
 579                refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, ArrowDown);
 580             else
 581                refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, L" ");
 582             break;
 583
 584         case MENU_FUNCTION_PAINT_SELECTION:
 585             // redraw selection cursor
 586             refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 2, MenuPosY + (State->PreviousSelection - State->FirstVisible));
 587             refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_CHOICE_BASIC);
 588             refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, DisplayStrings[State->PreviousSelection]);
 589             refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 2, MenuPosY + (State->CurrentSelection - State->FirstVisible));
 590             refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_CHOICE_CURRENT);
 591             refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, DisplayStrings[State->CurrentSelection]);
 592             break;
 593
 594         case MENU_FUNCTION_PAINT_TIMEOUT:
 595             if (ParamText[0] == 0) {
 596                 // clear message
 597                 refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_BASIC);
 598                 refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 0, ConHeight - 1);
 599                 refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, BlankLine + 1);
 600             } else {
 601                 // paint or update message
 602                 refit_call2_wrapper(ST->ConOut->SetAttribute, ST->ConOut, ATTR_ERROR);
 603                 refit_call3_wrapper(ST->ConOut->SetCursorPosition, ST->ConOut, 3, ConHeight - 1);
 604                 SPrint(TimeoutMessage, 255, L"%s  ", ParamText);
 605                 refit_call2_wrapper(ST->ConOut->OutputString, ST->ConOut, TimeoutMessage);
 606             }
 607             break;
 608
 609     }
 610 }
 611
 612 //
 613 // graphical generic style
 614 //
 615
 616
 617 static VOID DrawMenuText(IN CHAR16 *Text, IN UINTN SelectedWidth, IN UINTN XPos, IN UINTN YPos)
 618 {
 619     if (TextBuffer == NULL)
 620         TextBuffer = egCreateImage(LAYOUT_TEXT_WIDTH, TEXT_LINE_HEIGHT, FALSE);
 621
 622     egFillImage(TextBuffer, &MenuBackgroundPixel);
 623     if (SelectedWidth > 0) {
 624         // draw selection bar background
 625         egFillImageArea(TextBuffer, 0, 0, SelectedWidth, TextBuffer->Height,
 626                         &SelectionBackgroundPixel);
 627     }
 628
 629     // render the text
 630     egRenderText(Text, TextBuffer, TEXT_XMARGIN, TEXT_YMARGIN);
 631     BltImage(TextBuffer, XPos, YPos);
 632 }
 633
 634 // Displays sub-menus
 635 static VOID GraphicsMenuStyle(IN REFIT_MENU_SCREEN *Screen, IN SCROLL_STATE *State, IN UINTN Function, IN CHAR16 *ParamText)
 636 {
 637     INTN i;
 638     UINTN ItemWidth;
 639     static UINTN MenuWidth, EntriesPosX, EntriesPosY, TimeoutPosY;
 640
 641     State->ScrollMode = SCROLL_MODE_TEXT;
 642     switch (Function) {
 643
 644         case MENU_FUNCTION_INIT:
 645             InitScroll(State, Screen->EntryCount, 0);
 646
 647             // determine width of the menu
 648             MenuWidth = 20;  // minimum
 649             for (i = 0; i < (INTN)Screen->InfoLineCount; i++) {
 650                 ItemWidth = StrLen(Screen->InfoLines[i]);
 651                 if (MenuWidth < ItemWidth)
 652                     MenuWidth = ItemWidth;
 653             }
 654             for (i = 0; i <= State->MaxIndex; i++) {
 655                 ItemWidth = StrLen(Screen->Entries[i]->Title);
 656                 if (MenuWidth < ItemWidth)
 657                     MenuWidth = ItemWidth;
 658             }
 659             MenuWidth = TEXT_XMARGIN * 2 + MenuWidth * FONT_CELL_WIDTH;
 660             if (MenuWidth > LAYOUT_TEXT_WIDTH)
 661                 MenuWidth = LAYOUT_TEXT_WIDTH;
 662
 663             if (Screen->TitleImage)
 664                 EntriesPosX = (UGAWidth + (Screen->TitleImage->Width + TITLEICON_SPACING) - MenuWidth) >> 1;
 665             else
 666                 EntriesPosX = (UGAWidth - MenuWidth) >> 1;
 667             EntriesPosY = ((UGAHeight - LAYOUT_TOTAL_HEIGHT) >> 1) + LAYOUT_BANNER_YOFFSET + TEXT_LINE_HEIGHT * 2;
 668             TimeoutPosY = EntriesPosY + (Screen->EntryCount + 1) * TEXT_LINE_HEIGHT;
 669
 670             // initial painting
 671             SwitchToGraphicsAndClear();
 672             egMeasureText(Screen->Title, &ItemWidth, NULL);
 673             DrawMenuText(Screen->Title, 0, ((UGAWidth - ItemWidth) >> 1) - TEXT_XMARGIN, EntriesPosY - TEXT_LINE_HEIGHT * 2);
 674             if (Screen->TitleImage)
 675                 BltImageAlpha(Screen->TitleImage,
 676                               EntriesPosX - (Screen->TitleImage->Width + TITLEICON_SPACING), EntriesPosY,
 677                               &MenuBackgroundPixel);
 678             if (Screen->InfoLineCount > 0) {
 679                 for (i = 0; i < (INTN)Screen->InfoLineCount; i++) {
 680                     DrawMenuText(Screen->InfoLines[i], 0, EntriesPosX, EntriesPosY);
 681                     EntriesPosY += TEXT_LINE_HEIGHT;
 682                 }
 683                 EntriesPosY += TEXT_LINE_HEIGHT;  // also add a blank line
 684             }
 685
 686             break;
 687
 688         case MENU_FUNCTION_CLEANUP:
 689             // nothing to do
 690             break;
 691
 692         case MENU_FUNCTION_PAINT_ALL:
 693             for (i = 0; i <= State->MaxIndex; i++) {
 694                 DrawMenuText(Screen->Entries[i]->Title, (i == State->CurrentSelection) ? MenuWidth : 0,
 695                              EntriesPosX, EntriesPosY + i * TEXT_LINE_HEIGHT);
 696             }
 697             break;
 698
 699         case MENU_FUNCTION_PAINT_SELECTION:
 700             // redraw selection cursor
 701             DrawMenuText(Screen->Entries[State->PreviousSelection]->Title, 0,
 702                          EntriesPosX, EntriesPosY + State->PreviousSelection * TEXT_LINE_HEIGHT);
 703             DrawMenuText(Screen->Entries[State->CurrentSelection]->Title, MenuWidth,
 704                          EntriesPosX, EntriesPosY + State->CurrentSelection * TEXT_LINE_HEIGHT);
 705             break;
 706
 707         case MENU_FUNCTION_PAINT_TIMEOUT:
 708             DrawMenuText(ParamText, 0, EntriesPosX, TimeoutPosY);
 709             break;
 710
 711     }
 712 }
 713
 714 //
 715 // graphical main menu style
 716 //
 717
 718 static VOID DrawMainMenuEntry(REFIT_MENU_ENTRY *Entry, BOOLEAN selected, UINTN XPos, UINTN YPos)
 719 {
 720     UINTN ImageNum;
 721
 722     ImageNum = ((Entry->Row == 0) ? 0 : 2) + (selected ? 0 : 1);
 723     if (SelectionImages != NULL)
 724         BltImageCompositeBadge(SelectionImages[ImageNum],
 725                                Entry->Image, Entry->BadgeImage, XPos, YPos);
 726 }
 727
 728 static VOID DrawMainMenuText(IN CHAR16 *Text, IN UINTN XPos, IN UINTN YPos)
 729 {
 730     UINTN TextWidth, TextPosX;
 731
 732     if (TextBuffer == NULL)
 733         TextBuffer = egCreateImage(LAYOUT_TEXT_WIDTH, TEXT_LINE_HEIGHT, FALSE);
 734
 735     egFillImage(TextBuffer, &MenuBackgroundPixel);
 736
 737     // render the text
 738     egMeasureText(Text, &TextWidth, NULL);
 739     if (TextWidth > TextBuffer->Width)
 740        TextPosX = 0;
 741     else
 742        TextPosX = (TextBuffer->Width - TextWidth) / 2;
 743     egRenderText(Text, TextBuffer, TextPosX, 0);
 744 //    egRenderText(Text, TextBuffer, (TextBuffer->Width - TextWidth) >> 1, 0);
 745     BltImage(TextBuffer, XPos, YPos);
 746 }
 747
 748 static VOID PaintAll(IN REFIT_MENU_SCREEN *Screen, IN SCROLL_STATE *State, UINTN *itemPosX,
 749                      UINTN row0PosY, UINTN row1PosY, UINTN textPosY) {
 750    INTN i;
 751
 752    if (Screen->Entries[State->CurrentSelection]->Row == 0)
 753       AdjustScrollState(State);
 754    for (i = State->FirstVisible; i <= State->MaxIndex; i++) {
 755       if (Screen->Entries[i]->Row == 0) {
 756          if (i <= State->LastVisible) {
 757             DrawMainMenuEntry(Screen->Entries[i], (i == State->CurrentSelection) ? TRUE : FALSE,
 758                               itemPosX[i - State->FirstVisible], row0PosY);
 759          } // if
 760       } else {
 761          DrawMainMenuEntry(Screen->Entries[i], (i == State->CurrentSelection) ? TRUE : FALSE, itemPosX[i], row1PosY);
 762       }
 763    }
 764    if (!(GlobalConfig.HideUIFlags & HIDEUI_FLAG_LABEL))
 765       DrawMainMenuText(Screen->Entries[State->CurrentSelection]->Title,
 766                        (UGAWidth - LAYOUT_TEXT_WIDTH) >> 1, textPosY);
 767 } // static VOID PaintAll()
 768
 769 // Move the selection to State->CurrentSelection, adjusting icon row if necessary...
 770 static VOID PaintSelection(IN REFIT_MENU_SCREEN *Screen, IN SCROLL_STATE *State, UINTN *itemPosX,
 771                            UINTN row0PosY, UINTN row1PosY, UINTN textPosY) {
 772    UINTN XSelectPrev, XSelectCur, YPosPrev, YPosCur;
 773
 774    if (((State->CurrentSelection <= State->LastVisible) && (State->CurrentSelection >= State->FirstVisible)) ||
 775        (State->CurrentSelection >= State->InitialRow1) ) {
 776       if (Screen->Entries[State->PreviousSelection]->Row == 0) {
 777          XSelectPrev = State->PreviousSelection - State->FirstVisible;
 778          YPosPrev = row0PosY;
 779       } else {
 780          XSelectPrev = State->PreviousSelection;
 781          YPosPrev = row1PosY;
 782       } // if/else
 783       if (Screen->Entries[State->CurrentSelection]->Row == 0) {
 784          XSelectCur = State->CurrentSelection - State->FirstVisible;
 785          YPosCur = row0PosY;
 786       } else {
 787          XSelectCur = State->CurrentSelection;
 788          YPosCur = row1PosY;
 789       } // if/else
 790       DrawMainMenuEntry(Screen->Entries[State->PreviousSelection], FALSE, itemPosX[XSelectPrev], YPosPrev);
 791       DrawMainMenuEntry(Screen->Entries[State->CurrentSelection], TRUE, itemPosX[XSelectCur], YPosCur);
 792       if (!(GlobalConfig.HideUIFlags & HIDEUI_FLAG_LABEL))
 793          DrawMainMenuText(Screen->Entries[State->CurrentSelection]->Title,
 794                           (UGAWidth - LAYOUT_TEXT_WIDTH) >> 1, textPosY);
 795    } else { // Current selection not visible; must redraw the menu....
 796       MainMenuStyle(Screen, State, MENU_FUNCTION_PAINT_ALL, NULL);
 797    }
 798 } // static VOID MoveSelection(VOID)
 799
 800 // Display an icon at the specified location. Uses the image specified by
 801 // ExternalFilename if it's available, or BuiltInImage if it's not. The
 802 // Y position is specified as the center value, and so is adjusted by half
 803 // the icon's height. The X position is set along the icon's left
 804 // edge if Alignment == ALIGN_LEFT, and along the right edge if
 805 // Alignment == ALIGN_RIGHT
 806 static VOID PaintIcon(IN EG_EMBEDDED_IMAGE *BuiltInIcon, IN CHAR16 *ExternalFilename, UINTN PosX, UINTN PosY, UINTN Alignment) {
 807    EG_IMAGE *Icon = NULL;
 808
 809    if (FileExists(SelfDir, ExternalFilename))
 810       Icon = egLoadIcon(SelfDir, ExternalFilename, 48);
 811    if (Icon == NULL)
 812       Icon = egPrepareEmbeddedImage(BuiltInIcon, TRUE);
 813    if (Icon != NULL) {
 814       if (Alignment == ALIGN_RIGHT)
 815          PosX -= Icon->Width;
 816       BltImageAlpha(Icon, PosX, PosY - (Icon->Height / 2), &MenuBackgroundPixel);
 817    }
 818 } // static VOID PaintIcon()
 819
 820 // Display main menu in graphics mode
 821 VOID MainMenuStyle(IN REFIT_MENU_SCREEN *Screen, IN SCROLL_STATE *State, IN UINTN Function, IN CHAR16 *ParamText)
 822 {
 823     INTN i;
 824     static UINTN row0PosX, row0PosXRunning, row1PosY, row0Loaders;
 825     UINTN row0Count, row1Count, row1PosX, row1PosXRunning;
 826     static UINTN *itemPosX;
 827     static UINTN row0PosY, textPosY;
 828     CHAR16 FileName[256];
 829
 830     State->ScrollMode = SCROLL_MODE_ICONS;
 831     switch (Function) {
 832
 833         case MENU_FUNCTION_INIT:
 834             InitScroll(State, Screen->EntryCount, GlobalConfig.MaxTags);
 835
 836             // layout
 837             row0Count = 0;
 838             row1Count = 0;
 839             row0Loaders = 0;
 840             for (i = 0; i <= State->MaxIndex; i++) {
 841                if (Screen->Entries[i]->Row == 1) {
 842                   row1Count++;
 843                } else {
 844                   row0Loaders++;
 845                   if (row0Count < State->MaxVisible)
 846                      row0Count++;
 847                }
 848             }
 849             row0PosX = (UGAWidth + TILE_XSPACING - (ROW0_TILESIZE + TILE_XSPACING) * row0Count) >> 1;
 850             row0PosY = ((UGAHeight - LAYOUT_TOTAL_HEIGHT) >> 1) + LAYOUT_BANNER_YOFFSET;
 851             row1PosX = (UGAWidth + TILE_XSPACING - (ROW1_TILESIZE + TILE_XSPACING) * row1Count) >> 1;
 852             row1PosY = row0PosY + ROW0_TILESIZE + TILE_YSPACING;
 853             if (row1Count > 0)
 854                 textPosY = row1PosY + ROW1_TILESIZE + TILE_YSPACING;
 855             else
 856                 textPosY = row1PosY;
 857
 858             itemPosX = AllocatePool(sizeof(UINTN) * Screen->EntryCount);
 859             row0PosXRunning = row0PosX;
 860             row1PosXRunning = row1PosX;
 861             for (i = 0; i <= State->MaxIndex; i++) {
 862                 if (Screen->Entries[i]->Row == 0) {
 863                     itemPosX[i] = row0PosXRunning;
 864                     row0PosXRunning += ROW0_TILESIZE + TILE_XSPACING;
 865                 } else {
 866                     itemPosX[i] = row1PosXRunning;
 867                     row1PosXRunning += ROW1_TILESIZE + TILE_XSPACING;
 868                 }
 869             }
 870             // initial painting
 871             InitSelection();
 872             SwitchToGraphicsAndClear();
 873             break;
 874
 875         case MENU_FUNCTION_CLEANUP:
 876             FreePool(itemPosX);
 877             break;
 878
 879         case MENU_FUNCTION_PAINT_ALL:
 880             BltClearScreen(TRUE);
 881             PaintAll(Screen, State, itemPosX, row0PosY, row1PosY, textPosY);
 882             // For PaintIcon() calls, the starting Y position is moved to the midpoint
 883             // of the surrounding row; PaintIcon() adjusts this back up by half the
 884             // icon's height to properly center it.
 885             if ((State->FirstVisible > 0) && (!(GlobalConfig.HideUIFlags & HIDEUI_FLAG_ARROWS))) {
 886                SPrint(FileName, 255, L"%s\\arrow_left.icns", GlobalConfig.IconsDir ? GlobalConfig.IconsDir : DEFAULT_ICONS_DIR);
 887                PaintIcon(&egemb_arrow_left, FileName, row0PosX - TILE_XSPACING,
 888                          row0PosY + (ROW0_TILESIZE / 2), ALIGN_RIGHT);
 889             } // if
 890             if ((State->LastVisible < (row0Loaders - 1)) && (!(GlobalConfig.HideUIFlags & HIDEUI_FLAG_ARROWS))) {
 891                SPrint(FileName, 255, L"%s\\arrow_right.icns", GlobalConfig.IconsDir ? GlobalConfig.IconsDir : DEFAULT_ICONS_DIR);
 892                PaintIcon(&egemb_arrow_right, FileName,
 893                          (UGAWidth + (ROW0_TILESIZE + TILE_XSPACING) * State->MaxVisible) / 2 + TILE_XSPACING,
 894                          row0PosY + (ROW0_TILESIZE / 2), ALIGN_LEFT);
 895             } // if
 896             break;
 897
 898         case MENU_FUNCTION_PAINT_SELECTION:
 899             PaintSelection(Screen, State, itemPosX, row0PosY, row1PosY, textPosY);
 900             break;
 901
 902         case MENU_FUNCTION_PAINT_TIMEOUT:
 903             if (!(GlobalConfig.HideUIFlags & HIDEUI_FLAG_LABEL))
 904                 DrawMainMenuText(ParamText, (UGAWidth - LAYOUT_TEXT_WIDTH) >> 1, textPosY + TEXT_LINE_HEIGHT);
 905             break;
 906
 907     }
 908 }
 909
 910 //
 911 // user-callable dispatcher functions
 912 //
 913
 914 UINTN RunMenu(IN REFIT_MENU_SCREEN *Screen, OUT REFIT_MENU_ENTRY **ChosenEntry)
 915 {
 916     MENU_STYLE_FUNC Style = TextMenuStyle;
 917
 918     if (AllowGraphicsMode)
 919         Style = GraphicsMenuStyle;
 920
 921     return RunGenericMenu(Screen, Style, -1, ChosenEntry);
 922 }
 923
 924 UINTN RunMainMenu(IN REFIT_MENU_SCREEN *Screen, IN CHAR16* DefaultSelection, OUT REFIT_MENU_ENTRY **ChosenEntry)
 925 {
 926     MENU_STYLE_FUNC Style = TextMenuStyle;
 927     MENU_STYLE_FUNC MainStyle = TextMenuStyle;
 928     REFIT_MENU_ENTRY *TempChosenEntry;
 929     UINTN MenuExit = 0;
 930     UINTN DefaultEntryIndex = -1;
 931
 932     if (DefaultSelection != NULL) {
 933         // Find a menu entry that includes *DefaultSelection as a substring
 934         DefaultEntryIndex = FindMenuShortcutEntry(Screen, DefaultSelection);
 935         // If that didn't work, should we scan more characters?  For now, no.
 936     }
 937
 938     if (AllowGraphicsMode) {
 939         Style = GraphicsMenuStyle;
 940         MainStyle = MainMenuStyle;
 941     }
 942
 943     while (!MenuExit) {
 944         MenuExit = RunGenericMenu(Screen, MainStyle, DefaultEntryIndex, &TempChosenEntry);
 945         Screen->TimeoutSeconds = 0;
 946
 947         if (MenuExit == MENU_EXIT_DETAILS && TempChosenEntry->SubScreen != NULL) {
 948             MenuExit = RunGenericMenu(TempChosenEntry->SubScreen, Style, -1, &TempChosenEntry);
 949             if (MenuExit == MENU_EXIT_ESCAPE || TempChosenEntry->Tag == TAG_RETURN)
 950                 MenuExit = 0;
 951         }
 952     }
 953
 954     if (ChosenEntry)
 955         *ChosenEntry = TempChosenEntry;
 956     return MenuExit;
 957 } /* UINTN RunMainMenu() */